19 is the prime number.
19 is prime.
19 is the prime number.
19
105 is not prime. 105 = 3 * 5 * 7
19 is the prime number.
19 is prime.
19 is the prime number out of the provided choices.
19 is the prime number.
9 is the prime number.
19
19
19 is the only one that only has 1 and itself as factors. It is the prime number.
105 is not a prime number. If you say that 105 is a number written in base 6, it is the same as 41 in base 10, which is a prime number.
105 is not prime. 105 = 3 * 5 * 7
105 is a composite number
19 is a prime.